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MACHINE FOR MAKING GRIMPED STOVEPIPB ELBOWSF June '5, 1895.

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G. OUNIN. MAGHINE FOR MAKING GRIMPED STOVEPIPE ELBOWS. No. 541,472.

Patented June' 25, 1895.

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} G; CUNIN. MACHINE FOR MAKING GRIMPBD STOVBPIPE ELBOWS. No. 541,472.

Patented June 25, 1895.

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G. OUNIN. MACHINE FOR MAKING GRIMPED STOVEPIPE ELBOWS.

5 SheetsSheet 4.

PatentedJune25, 1895.

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' G CUNIN v MAGHINB FOR MAKING GRIMPED STOVEPIPE ELBOWS.

Patented June 25, 1895'.

' 'ilNrrao STATES PATENT-OFFICE.

GEORGE CUNIN, OF MONTREAL, CANADA.

MACHINE FOR MAKING CRIMPED STOVEPlPE-ELBOWS.'

SPECIFICATION forming part of Letters Patent No. 541,472, dated June 25,1895.

Application filed September 4, 1894. Sen'al No. 522.065. (N mod l.)

To all whom, it may concern.-

Be it known that I, GEORGE CUNIN, a citizen of the Dominion of Canada,residing in the city and district of Montreal and Province ofQuebec,'0anada,' have invented certain new and useful Improvements inMachines for Making Oriinped Stovepipe-Elbows; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to machines for making pipe elbows; and itconsists in the novel construction and combination of the partshereinafter fully described and claimed.

In the drawings, Figure 1 is a side view of the machine. Fig. 2 is aplan view of the same. Fig. 3 is a front end View showingthe yoke open.Fig. 3 is a plan view of the end piece r and the slide 6, showing theguides 8 in section; and Fig. 4 is a similar view showing the yokeclosed.' Fig. 5 is a longitudinal section taken on the line Z Z in Fig.3. Fig. 6 is a longitudinal section through the mandrel andmandrel-holder. Fig. 7 is a detail view showing the'connection of theconnecting-rod E to the cross-head a. Fig. 8 is a longitudinal sectionthrough the main drivingshaft and its co-operating parts, and Fig. 9 isa plan view of the same. Fig. 10 is a detail front view of the yoke Y.Fig. 11 is a detail front View of the parts carried by the yoke. Fig. 12is a side view showing the attachment of the yoke to the frame A. Fig.13 is a plan View of the same. Fig. 14 is a side view of the tripmechanism for stopping the machine. Fig. 15 is a crosssection throughthe mandrel, taken on the line 00 a: in Fig. 6.

A is the frame of the machine provided at its rear end with bearings Bin which the hollow main driving shaft 0 is journaled.

G is the driving pulley which is loose on the shaft 0. The end 0 of theshaft 0 is provided with an enlargement 0 having a slot 0 formed throughit. (See Fig. 8.)

1 is a rod which slides in the hollow shaft 0 and carries a cotter Iwhich slides in the slot C H is a disk secured on the end 0 of the shaft0. When in the position shown in Fig.

8, the cotter 1 engages with notches in the hub of the driving pulley Gand operatively connects it to the shaft 0, but when moved to the leftthe cotter slips out of the said notches and disengages thedrivingpulley.

L is a plate secured on the end of the rod 1 L is a plate which slideson the boss G of the hub of the pulley G. L are rods connecting theplates L and L together.

L is a bar projecting from the plate L and provided with rollers Z Z asshown in Fig. 9. The bar L is provided with a head which slides in acircular recessed groove 51 in the face of the plate L, and 52 areguides on the top of the adjacent bearing B for the said bar to slidebetween. This bar affords a means for disengaging the driving pulley andstopping the machine as will be more fully described hereinafter.

The central portion of the shaft 0 is provided with an enlargement 0having a slot C formed through it.

1 is a rod which slides in the hollow shaft 0 and carries a cotter Iwhich slides in the slot 0 D and E are two eccentrics mounted loosely onthe central part of the shaft 0 and provided with notches for the cotter1 to engage with. The rod and the cotter I are moved back and forth toalternately couple the eccentrics D and E to the shaft G.

F is a cam plate secured on the end 0 of the shaft G and provided withthe two tappets F and F projecting from its flange F. A plate K issecured to the end of the rod 1 and slides on the guides K and K (seeFig. 2) which project from the shaft hearing or support A pin 76projects downwardly from the plate K and is provided with a cross pieceRollers 70 are journaled on pins projecting from the cross piece In, andare arranged on opposite sides of the flange F in the paths of thetappets F and F The tappets strike the rollers 70 as the shaft 0revolves, and the rod 1 is reciprocated and caused to couple theeccentrics D and E alternately to the shaft 0. The eccentric D isprovided with a strap D and a rod D the end of which is pivoted to thecross head cl. (See. Fig. 1.) The cross head d slides in the guide dcarried by the frame A.

M is a rod secured to the cross head d and provided at its front endwith the wedge m for Working the crimping mechanism. The i wedge mslides on the frame A and under the end piece 7' of the frame R, asshown in Fig. 5, and is provided with rollers m and m for reducing thefriction between it and the said parts against which it bears.

N is a support or holder for the mandrel, secured to the frame A atabout the middle of the machine.

N is the mandrel (see Fig. 6) secured at one end to the mandrel holder.

0 is a sheet-iron tube or cylinder which is to be formed into apipe-elbow. This cylinder is slid upon the mandrel.

P is a ring which is free to slide on the mandrel N. The cylinder 0 isclamped to the ring P at O by means of a band P. The band P encirclesthe cylinder, and its ends (see Fig. 2) are secured to two crank pins 2projecting from crank plates 19. The crank plates 1) are secured on theshafts 3 which are journaled in a bracket 4 secured to the ring P..Levers p are secured on the ends of the shafts 3, and when the saidlevers are moved apart, the crank pins are moved toward each other andthe band P is caused to clamp the end of the cylinder 0.

The eccentric E for moving the tube 0 longitudinally, is provided with astrap and a rod E of ordinary approved construction, and the end of therod E (see Fig. 6) is pivoted to the cross head 6 which slides in theguide e secured to the mandrel support N Pawls 1 i are pivoted to thesides of the cross head 6 as shown in Figs. 1, 2 and 7, and effect thelongitudinal movement of the tube 0 as will be more fully describedhereinafter.

The crimping device consists of a ring S made in four sections 3, s sand s, as shown in Fig. 11. These sections are secured to two segments Sand S by the bolts S and their position is adjusted by the set screws SThe segments are pivoted together by the link S and their upper partsare provided with guide bolts 6 and S.

Y is ayoke formed in two parts as shown in Figs. 10, 12, and 13. Thisyoke is supported by the frame A behind the crimping device S. The upperparts of the yoke are provided with curved slots V and W for the bolts Sand S to slide in. yoke slide in a dovetailed slot in the frameA and aremoved apart when required by means of the revoluble shaft Y which isprovided with right and left hand screw-threads Y engaging with nuts Ysecured to the parts of the yoke. A slide 6 works in the vertical guidesS secured to the frame A, and the end piece 4' of the frame R is securedto the slide (5. The frame R consists of the end piece r and the links0" and 0' which are pivotally connected to the end piece 0 and to thelugs 7 on the segments S and S.

T is a sliding piston splined in the end of the mandrel N, and U is adisk fitting inside the tube 0 and provided with a central convex boss UA rod e is provided with a pin 6 at its rear end (see Fig. 6) whichslides The parts of the vided on the end of the rod to keep the saiddisk in place. A red c is pivoted at its rear end to the cross head eand has its front end passed through holes in the end of the piston andthe disk U and secured to the lower part of the disk U below the boss UPawls 15 (see Figs. 1 and 2) are pivoted to the sides of the cross headc and engage with rachet teeth on the rack bars t which are carried bythe supports a a The front ends of the rack bars are secured to the ringP, and b are cords secured to the rear ends of the rack barsand providedwith weights 1). Pulleys Z2 are provided at the rear end of the machinefor the cords b to run over.

B is a handle pivoted to the support 10, and 11 is a link pivoted to theend of the handle and to the middle of a cross bar 21. Links 12 and 13are pivoted on the ends of the bar 21. The links 12 are pivoted to thepawls t and the links 13 are pivoted to the stop pawls Z) which alsoengage with the ratchet teeth of the rack bars. The pawls are normallyheld in gear with the rack bars by the spring 14.

The disengaging bar L (see Figs. 9 and 2) is operated by the bent bar dwhich is attached to the rear end of the rod d and 15 is a rod attachedto the front end of the rod (Z and provided at its front end with ahandle at so that the machine can be started and stopped by the operatorat the front end of the machine. The front end of the rod (1 rests on alever 16 which is pivoted on a pin 17 projecting from the frame, and 19is a spring which normally holdsthe front end of the rod d raised,asshown, so that the shoulder cl of the rod is clear of the tappet d whichis secured to the guide e, as shown in Fig. 2. A projection 18 on theend of the rack bar t turns the lever 16 and lowers the end of the bar(Z before the rack bars arrive at the end of their travel toward thefront of the machine. The tappet (Z then pushes back the rod d and stopsthe machine. When the pawls t and b are raised, the rack bars are pulledback by the weights 1), and the spring actuated lever 16 raises theshoulder cl clear of the tappet d so that the machine may be started byhand by means of the rod 15.

The operation of the machine is as follows: The tube 0 is insertedthrough the yoke Y over the mandrel and is then clamped by the band Ptothe ring P. The machine is started by pushing back the rod 15, theshaft 0 being coupled to the eccentric D as shown in Fig.8. Theeccentric D pulls back the rod M, and the wedge m raises the frameR andthe crimping device. Thelowerpart of the tube 0 is pressed away from thepart 'y of the yoke (see Fig. (3) and its upper part is pressed againstthe part IIO 1 and slides the cotterIso that the eccentric 'D isdisconnected from, and the eccentric E' connected to, the revolvingshaft 0. The eccentric E now pulls back the'cross head 6 and the rod 6The lower side of the diskU is caused to compress the indentation orcrimp formed in the tube 0, but the rod c and the diskUare notpulled'back until the indentation has been compressed because of theslot in which the pin 6 works. When the continued motion of the crosshead e pulls back both the rods e and 6 the crimp or indentation issmoothed flat upon the inside of the tube 0. The continued motion of theeccentric E now pushes forward the cross head e. The pawls t engage withthe rack bars and push forward the ring I? and the tube 0. When the rackbars are pushed back for the space of one tooth, the pawls I) drop bygravity into the next teeth and prevent the return of the rack bars byhearing against the supports a. The disks U and U are also pushedforward to the positions shown in Fig. 6 and the machine is then readyfor the next upstroke of the crimping device.

What I claim is 1. In a pipe-elbow machine, the combination, withthedriving shaft 0, the two eccentrics D and E, and means for connectingthe said eccentrics to the said shaft alternately; of a crimping deviceoperativelyconnected to the eccentric D; and disks, for compressing andsmoothing the crimp, operatively connected to the eccentric E,substantially as set forth.

2. In a pipe-elbow machine, the combination, with the driving shaft 0provided with a slot 0 of the eccentrics D and E mounted on the saidshaft and provided with notches; the rod sliding in a hole in the shaft0 and provided with the cotter I for alternately coupling the saideccentrics to the shaft, a cam plate secured on the shaft 0, and tappetmechanism secured to the said rod and operated by the said cam, wherebythe said rod is reciprocated in the shaft, substantially as set forth.

3. In a pipe-elbow machine, the combination, with the rod M, and drivingmechanism for reciprocating it; of the Wedge m secured to the said rod,the jointed frame R resting on the said -wedge,'and the crimping devicesupported by the said frame and raised and lowered by the said wedge,substantially as set forth.

4. In a pipe-elbow machine, the combination,with the yoke Y formed oftwo separable parts provided respectively with the curved guide groovesV and W, and the revoluble shaft provided with right and left hand screwthreads engaging with the said parts of the yoke and affording a meansfor opening and closing it; of the crimping device provided with guidebolts-slidingin the said grooves; and driving devices operating to raiseand lower the said crimping device, substantially as set forth.

5. In a pipe-elbow machine, the combination, with the stationary guides8, of the slide 6 working in the saidguides, the frame R consisting ofthe cross piece r secured to the said slide and the pivoted links '1" Tthe crimping device pivotally connected to the said links, the wedge marranged under the said cross piece and slide, and means forreciprocating the wedge and thereby raising and lowering the crimpingdevice, substantially as set forth.

6. In a pipe-elbow machine, the combination,with the mandrel N, of thepiston T sliding therein, the disk U secured to the said piston, thedisk U pivoted to the disk-U, the reciprocatory cross head e providedwith the slot 6 the rod e provided with a pin 6 sliding in the saidslot, the front end of the said rod being connected to the said disksand piston; arid the rod e pivoted to the said cross head and connectedto the disk U, substantially as and for the purpose set forth.

7. In a pipe-elbow machine, the combination, with the mandrel N, and thering P sliding thereon and provided with clamping devices for the tubeto be crimped; of the reciprocatory cross head e, the rack bars providedwith ratchet teeth and secured to the said ring,the pawls pivoted to thecross head and engaging with the rack bars, and stop pawls forpreventing the reverse motion of the rack bars, substantially as setforth.

8. In a pipe-elbow machine, the combination, with the mandrel N, and thering? sliding thereon and provided with clamping devices; of the toothedrack bars, and the weights attached to them and operating to pull thesaid ring rearwardly along the mandrel; the reciprocatory cross head 6,and the pawls pivoted to itand engaging with the rack bars; the stoppawls b; and pivoted-link mechanism operating to raise the said pawlssimultaneously, thereby permitting the said ring to slide back,substantially as set forth.

9. In a pipe-elbow machine, the combination, with the reciprocatorycross head 6 provided with pawls 25 and a tappet d the rack barsengaging with the said pawls, the mandrel; and the ring sliding on themandrel, secured to the rack bars, and provided with clamping devices;of disengaging mechanism for stopping the machine, provided with anoperating rod having a shoulder d; 'the spring-actuated lever 16normally supporting the end of the said rod, and a projection on oneside of one of the rack bars for operating the said'lever and loweringthe end of the said rod, thereby permitting the tappet to strike thesaid shoulder and operate the said disengaging mechanism, substantiallyas set forth.

ing mechanism for operating the crimping device when the said disks arepushed forward; and a driving shaft provided with automatic couplingdevices connecting it with the two said driving mechanisms alternately,substantially as and for the purpose set forth.

In testimony whereof I aflix my signature in presence of two Witnesses.

GEORGE CUNIN. Vitnesses:

JAMES LARVIM, II. DURIER.

